A small pocket of fat under the chin can be surprisingly stubborn. Some people have it despite being at a healthy weight, often because of genetics or the way they age. Fat-dissolving injections, also called injection lipolysis, are one non-surgical option for this area. If you are considering lipolysis injections, this guide explains how they work, who they suit, what to expect in terms of swelling and sessions, and what other options exist.
Injection lipolysis is a medical treatment. It is designed for small, localised areas of fat, not for weight loss. Results vary between individuals, and a licensed doctor should assess whether it is suitable for you.
What injection lipolysis is
Injection lipolysis involves injecting a substance into a targeted area of fat beneath the skin. The active ingredient is designed to break down the membranes of fat cells. Once disrupted, these fat cells are gradually cleared by the body over the following weeks.
The most widely studied ingredient for this purpose is deoxycholic acid, a synthetic version of a substance the body naturally makes to help break down dietary fat. Some products combine other ingredients, and formulations and approvals vary between countries. Your doctor should tell you exactly which product will be used and whether it is approved for that use in the UAE.
It is important to understand what this treatment can and cannot do:
- It targets small, defined pockets of fat, not larger areas.
- It is not a weight-loss treatment and does not reduce overall body weight.
- Treated fat cells are cleared, but remaining fat cells in the area can still grow if you gain weight.
- Changes are gradual, developing over weeks after each session.
Double chin and other treatment areas
The area most commonly treated with fat dissolving injections is the fat under the chin, sometimes called submental fat or a double chin. This is also the area where the most evidence exists for some products.
Depending on the product and the doctor’s assessment, injection lipolysis may also be considered for other small areas, such as:
- Fat along the jawline
- Small pockets on the abdomen
- The bra-line area
- The inner thighs or knees
Some of these uses are off-label, meaning the product is not specifically approved for that area. Your doctor should explain this clearly before treatment.
Who is a candidate
Injection lipolysis is generally considered for adults who:
- Have a small, defined pocket of fat that has not responded to diet and exercise
- Are at or near a stable, healthy weight
- Have good skin elasticity in the area
- Understand that changes are gradual and vary between people
- Are willing to accept a period of swelling after each session
It is usually not the right choice if:
- The main concern is loose or sagging skin rather than fat, where other treatments may suit better
- There is a large amount of fat in the area
- The goal is overall weight loss
Injection lipolysis may not be suitable, or needs extra caution, if you are pregnant or breastfeeding, have an active infection in the area, have had previous surgery or treatment to the area, have a bleeding disorder, have difficulty swallowing, or have certain other medical conditions. A swelling under the chin can also have other causes, such as an enlarged thyroid or salivary gland, so a doctor should examine the area first.
Swelling, side effects and downtime
Swelling is the most common and noticeable effect, especially under the chin. It can be significant and may last from several days to a couple of weeks after each session. Many people plan treatment around this.
Other common, usually temporary effects include:
- Pain, burning or tenderness during and after injection
- Bruising
- Numbness in the treated area
- Redness
- Hardness or small lumps as the area heals
Less common but more serious effects can occur. Under the chin, these include temporary nerve injury that can cause an uneven smile or weakness of the lower lip, difficulty swallowing, and, rarely, skin damage or ulceration. Contact your clinic straight away if you notice an uneven smile, difficulty swallowing, worsening pain or any skin changes.
General aftercare often includes using cold compresses as advised, sleeping with your head slightly raised, avoiding massaging the area unless instructed, and avoiding strenuous exercise for a short period.
Number of sessions
Injection lipolysis is usually given as a course of sessions, spaced at least several weeks apart to allow swelling to settle and the body to clear treated fat cells. The number of sessions depends on:
- The amount of fat in the area
- The product used
- How your body responds
- Your goals
Your doctor should assess progress between sessions and stop once further treatment is not needed or not helpful.
Non-injection double chin options
Injections are not the only option. Depending on your concern, a doctor may discuss:
- Fat-freezing treatments, which cool fat cells under the skin
- Radiofrequency or ultrasound treatments, which are aimed mainly at skin laxity rather than fat
- Weight management, if overall weight is a factor
- Surgical options, such as liposuction or a neck lift, for larger amounts of fat or loose skin
The right choice depends on whether the main issue is fat, loose skin or both. A double chin treatment consultation can help you work out which approach fits.
If you are considering injection lipolysis, start with a consultation where a doctor can examine the area, confirm the cause, and explain realistic expectations.
FAQs
Are fat-dissolving injections permanent? Treated fat cells are cleared by the body, but remaining fat cells can still grow with weight gain, so results are not guaranteed to be permanent.
Can I use lipolysis injections to lose weight? No. Injection lipolysis is for small, localised areas of fat and is not a weight-loss treatment.
How long does the swelling last? Swelling under the chin is common and can last from several days to a couple of weeks after each session.
How many sessions will I need? Most people need a course of sessions spaced several weeks apart. Your doctor will assess progress between sessions.
Is a double chin always caused by fat? No. Loose skin, jaw shape or other causes can contribute, so a doctor should examine the area first.
What if I notice an uneven smile after treatment? Contact your clinic straight away, as this can be a sign of temporary nerve irritation.
